#include<stdio.h>
int main()
{
    int max(int ,int);
    int(*p)(int,int);//定义指向函数的指针变量
    int a,b,c;
    p=max;//使得指针指向max函数
    printf("please enter a and b\n");
    scanf("%d,%d",&a,&b);
    c=(*p)(a,b);
    printf("%d is bigger than %d\n",a,b,c);
    return 0;
}
int max(int x,int y)
{
    int z;
    if(x>y) z=x;
    else z=y;
    return(z);
}